Update README.md

README.md

@@ -145,5 +145,12 @@ For example, if you want to use an environment variable to set the `name` parame
 
 `KAFKA_CLUSTERS_2_NAME`
 
+* `KAFKA_CLUSTERS_2_NAME`
+* `KAFKA_CLUSTERS_2_BOOTSTRAPSERVERS`
+* `KAFKA_CLUSTERS_2_ZOOKEEPER`
+* `KAFKA_CLUSTERS_2_SCHEMAREGISTRYS`
+* `KAFKA_CLUSTERS_2_SCHEMANAMETEMPLATE`
+* `KAFKA_CLUSTERS_2_JMXPORT`
+